Edward d



(No Model.) 2 Sheets-Sheet 2. E. D. JOHNSTON. MORTAR MIXING APPARATUS.

No. 440,478. Patented Nov. 11, l890 /N VENTOH 6520/( @y 1 A fr0/m5 ys UNITED STATES PATENT OFFICE.

EDVARD D. JOHNSTON, OF NEV YORK, N. Y.

MORTAR-MIXING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 440,478, dated November 11, 1890.

Application filed January 3l, 1890. Serial No. 338,825. (No model.)

To @ZZ whom it may concern.-

Be it known that I, EDWARD D. JOHNSTON, of the city, county, and State of New York, have invented a new and Improved Mortar- Mixing Apparatus, of which the following is a full, clear, and exact description.

My invention relates to improvements in an apparatus for mixing mortar, cement, plastering, and similar compounds. Heretofore it has been the practice foraperson to mix such compounds in a pen by means of a hoe, the operator adding lime, sand, water rbc., as needed, and the operation has usually been carried on upon the premises where the material was to be used. In mixing mortar in this manner a great deal of labor is required, and as the operation is frequently carried on in the street it is often a source of annoyance and inconvenience to passers by.

The object of my invention is to obviate these difficulties by providing an apparatus in which mortar and similar compounds may be quickly, cheaply, and efficiently mixed.

To this end my invention consists in certain features of construction and combinations of parts, that will be hereinafter fully described, and specifically pointed out in the claim.A4

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is avertical section ot' the device or apparatus embodying my invention on the line a; a: of Fig. 2. Fig. 2 is an end View of the same with the mixing-cylinder in longi tudinal section; Fig. 3, a plan view of the mixing-cylinder with the upper half thereof removed. Fig. 4t is a vertical crosssection of the mixing-cylinder provided with a modified form of mixing apparatus on the line y g/ of Fig. 5, and Fig. 5 a horizontal section of the same on the line Z e of Fig. a.

Supported by suitable brackets B in an elevated position, preferably in the second story of a building, is an inclined tubular sieve A, which is mounted upon the shaft C, which turns in the brackets B. Thesieve A is open at each end and is supported upon the shaft O by the spokes a, which extend from bands b, to which the sieve is attached, to the collars d, which areV fixed to the shaft. The sieve A is for sifting sand, and it is provided at its upper end with a tubular extension A', which is not perforated, into which the sand to be sifted is dumped, the sand being conducted into said tube by the chute D, which enters the end thereof.

The shaft O is provided with a suitable pulley E, by which it is operated, and passes loosely through a hollow shaft C', extending into the lower end of the sieve, and provided with an operating-pulleyE and with brushes F, which are firmly attached to the shaft. The shaft C and brushes F extend into the tubular sieve A a little more than half its length. The brushes F may be made of wire,` bristles, or of any suitable material, and are of such a length that they will touch lightly against the inner surface of the sieve..

The brushes F and sieve A are fixed upon separate shafts that they may be rotated in opposite directions. By operating them in this manner the finer sand will be forced through the meshes of the sieve, and the coarser particles will pass out at the lower end thereof and the sieve be kept perfectly clean by the brushes.

Suitably supported beneath the body of the sieve A is a bin ll, having tapering sides which terminate at the bottom in aspout H', and beneath the lower end of the sieve A is a chute J, which may be connected with another chute, so that the material which falls into it may be directed into any desired receptacle. The bin Il will thus receive the iiner sand, and the coarser particles will pass off through the chute J. In the lower end of the spout H of the bin H is a slide c, which projects through the side of the spout H', and is provided with a suitable handle e', so that by manipulating the handle the sand in the bin may be allowed to flow through the spout, and may be cut off at will. To the lower end of the spout is attached aspout K, which is made preferably of canvas, but may be made of any suitable material. This spout is provided with a metal nozzle K at its lower end, in which is fixed a slide f, having a handle f', by means of which the nozzle may be opened and closed; or the spout may be provided with a cap having a snap-clamp.

The spout K, between the slides c and f,

IOO

sufficient lime between the two slides to.

charge the mixing-cylinder.

The water necessary to mix with the sand and lime may be introduced in any suitable way, and a tank may be provided which will hold the-exact amount necessary.

The mixing-cylinder is composed of two longitudinallyeseparable parts N N', which .are provided with corresponding flanges g, which may be provided with bolts or clamps, Aand by means of which the parts are fastened together. The cylinder 'is mounted loosely and to turn upon the shaft O, which rests in suitable supports P at each end of the cylinder. The'cylinder .is provided with agearwheel h, which also turns upon the shaft O, vand which is bolted to the lower part N' -of the cylinder. vcylinder is attached to the shaft O by the straps t', which pass over the top of the shaft and are bolted at each lend to the part N. rlhe'shaft O extends beyond the supports P, in which it rests, so that the ends of the shaft may be engaged by the hooks of a derrick-an'd the shaft and the lower half of 'the cylinder lifted bodily and carried to a wagon or other receptacle, where the part N of the cylinder may be dumped. Within the cylinder and rigidly attached to the shaft O 4is a coarse sieve R, which extends at right vangles with the shaft to one side of the cylind er, and which is kprovided with supportingbraces R. The shaft O is also provided with arms j,which extend diagonally upward above the sieve R, and which are provided at the V.terminal ends with a cleaver or scraper Z,which -is curved forwardly from the ends of the arms j, so as to-nearly touch the sides of the cylinder, to which itcorresponds in shape. The scraper-arms j are provided with suitable braces j', which may be formed of the same pieces as the arms,the arms being bent around the shaft O, so that the scraper-holding portion j shall extend upwardly from the back side of the shaft and t-he supporting portion j' extend upwardly against the same from the front side of the shaft. The object of the scraper is to prevent the mortar from accumulating upon the sides of the cylinder. As the cylinder revolves, the scraper will scrape the mortar from the sides thereof and the lumps will fall upon the coarse sieve R and be disintegrated.

` Power is applied to the gearwheel 71, and the device is operated as follows: The brushes The lower part N of thev F and sieve A are set in motion and sand is dumped upon the chute D to supply the sieve. The liner sand will fall into the bin Hand the coarser particles will pass off through the chute J, as described. After the bin His filled it will not be necessary to operate the sieve whenever the mixing-cylinder is operated, as the bin will hold sufficient sand to charge the cylinder many times. When the mortar is to be mixed, the top N of the cylinder is removed, a charge of sand and lime is inserted from the bins H and L, as described, and sufficient water is added to complete the mix ture. The top N is then fastened to the bottom portion N' of the cylinder and the cylinder is set in motion. As the cylinder revolves, the parts will become thoroughly mingled, the scraper Z and sieve R will prevent the matter 'from becoming lumpy,and the result 'will be a superior quality' of mortar.

If plastering is to be made, the necessary quantity of hair may be introduced into the cylinder, and if other vcompounds y.are to be mixed the operation may be'varied accordingly.

Ido not confine myself -to any vparticular arrangement of the .sand and lime bins, as they may be arranged in any suitable .mam ner; but they should be higher'thanfthemixing-cylinder, so that lthe sandvandlime -will easily flow into the same.

In Figs. 4. and 5 I have shown the cylinder N N mounted loosely'upon .a'rotatable-shaft O' the cylinder having the gear-wheel'hlixed thereto, as described, and the shaft beingprovided with a gear-wheel t, so that the cylinder may be revolvedin on'evdirect-ion and the shaft O' in the other.

Attached to the shaftIO' are three series of radially-extending arms r, although the number may be increased or diminished'without changing the nature of the invention. All the arms or knives of a seriesare parallel, and they are turned to the same angle;

lbut the angle of the knives r of eachseries is different, and they revolve in different paths, so that as the shaft O turnsthe knives fr will pass through the mortar in the cylinder and throw it from knife to knife, thus thoroughly stirring the mass and mingling the parts.

The knives r extend nearly tothesides of the'cylinder and are united at the ends by a band Z', which extends the lenngthf'of 'the cylinder and scrapes the mortar from thesides thereof.

From the foregoing description it will be seen that mortar or other similar compounds may be madevinlarge quantities in a certain locality and carried ready-made to the points where it is to be used. Y

Having thus described my invention, what I claim as new, and desire toisecure by Letters Patent, is-

In a mortar mixing apparatus, a rotatable longitudinally=separable cylinder into which the ingredients to be mingled are inserted, mortar will be scraped from the sides of the said cylinder being" loosely mounted upon a cylinder upon the sieve, substantially as de- Xed shaft andhaving a coarse sieve attached scribed.

to said shaft at right angles with the same, E'DVARD D. JOHNSTON. y and a suitable scraper supported upon said Witnesses: shaft and extending to a point near the side WARREN B. IIUTCHINSON,

of the cylinder above said sieve, so that the EDGAR TATE. 

